Physics126.Exam 3 Winter05

# Physics126.Exam 3 Winter05 - I Universityof Michigan...

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I University of Michigan Physics 126 Winter 2045 Exam 3 Form 2 Instructions: Please keep booklet closed until instructed. You rfiay use notes on three sides of a 3x5 index card Answer questions on the scantron sheet by blackening the dot You will have 1.5 hours for the exam. Useful Physical Constants : e=!.602x10-1e C so = 8.85x10-12 c2 (N .m2) k -I/(4ne) =8.99x10e N'm2 /C2 8 =9.8 mlsz /to=4nxra-7 T'm/A c - 3x108 m/s

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I t. 51 t; |tf dl I li lz- ft:Mz f2 - 71: \' lz * rt:7u ,/\ Two stars are jg9!!g_ely resolvgd by a telescope with a lensliameter of 0.500 m. / Determine the angulai sep#ation of the two stars. Assume incident light of-WrzCle{t-gth 500.0 nm. a A) 4.88 x 10-'rad B\ 2.44 x l0-7rad C) 1.22x 107rad D) 5.66 x 10-5rad /'a {'E)} .22 x l}n rad 3. Ifwe that ei the minimum thickness of a soap film (n: 1.33) in air viewed by reflected light of wave length 400 nr; l. a1:, ll\.-t8 nm is A) 200 nm p-)-.100 nm (Q)i75 nm D) 57 nm E) 225 nm lr- '\ :l '::: ! t t 1r'\ 'd!]* iI* n :r h' Page I
4. A light bulb burns in front of the center of a 40-cm wide mirror that is hung vertically on a wall. A man walks in front of the mirror along a line that is parallel to the mirror 20cm \ 40 cm and rwice as far from it as the bulb. The totu:?glt hg,galwalk and still see the image ofthebulb is: f'-"r:: " t'ft *a:; .,'4 S n*- A) B) .Q) 60 cm (D)80 cm Y; tzo cm I r 10cm .t i ift1 zc{u.-T -".} ^^ 15,'j i. ,,t, t.<-llcm+t Note: The diagram is not drawn to scale. 1 rl n-o *.*,4, :p. {- Lf{ _ * '' j\$: 1* il: \{) 5. A second converging l6[s is piaced 20.0 cm to the right of the lens shown in the figure. Determine the foiallengh oithe second lens if an inverted image (relative tothe object in ihe diagram) is formel 13.3 cin t6"the rigtrt'ofihe first lens.

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Physics126.Exam 3 Winter05 - I Universityof Michigan...

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